Power-actuated engraving-tool.



W. E. STEPHENSON.

POWER. ACTUATED ENGRAVING TOOL.

APPLICATION FILED APR.22, 1916.

1,2]. 6,007. Patented Feb. 13, 1917.

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To all whom it may concern:

Be it known that I, WVALTER E. STEPHEN- SON, a citizen of theUnited States,and a resident of .Roosevelt, in the county of N assau and State of New York, have invented a new andlmproved Power-Actuated Engrai 'ing-Tool, of which the following is a full, clear, and exact description.

My invention relates to apower-driven engraving tool; and the object thereof is to provide a simple, convenient, and efficient tool which can be easily manipulatedand properly guided while driven.

\Vith the above and other objects in view, thenature of which will more fully appear as the description proceeds, the invention consists in the novel construction, combination and arrangement of parts as'he-rein fully described, illustrated-and claim-ed. In the accompanying drawings, forming part of the application, similar characters of reference indicate cor-responding parts in all the views. v

Figured is a perspective view of the tool Fig. 2 is a longitudinal section onl'ine 22, Fig. 3.

Fig. 3 is abottom-up View with the bottom removed;

Fig. 4 is a transverse section on line 4.4, Fig. 2; and

Fig. 5 is a perspective view of the burin holder.

Referring to the drawings, 6 is the housing of the tool which is shaped to be easily accommodated in the hand. It has a T- shaped recess 7 in the open bottom thereof disposed in the longitudinal axis of the tool at the forward end of the housing. The recess 7 enters a transverse groove 8 which is disposed obliquely to the open bottom of the tool and also at a slight angle with the longitudinal axis of the tool. The slot 8 is closed at the top of the housing by a cover section 9 which has a recess 10 forming an extension of said slot.

A disk 11 is housed in the slot 8. The disk is keyed to a shaft 12 which projects to the rear of the housing, said shaft being substantially normal to the slot 8 in both planes, consequently in plan as shown in Fig. 3 the shaft 12 is at a slight angle with the longitudinal axis of the housing. In elevation the angle of the shaft with the longitudinal axis is more pronounced. This arrangement places the shaft in a position which facilitates the handling of the tool Specification of Letters Patent.

rammed at; 13,1917.

Application filed A-pril 22, 191i6. Serial No. 92,877.

during the rotation of the shaft, and to obtain such a location of the shaft the recess Sm'ust be formed in the-manner as described relative to the axis of the tool.

--The face of the disk opposite the T-shaped 'slot7 is undulated to form a smooth wavy surface 13 against which restsa tooth 1a of the burin holder 15 located within the T- shaped slot 7. The portion of the holder entering the enlarged part of the slot 7 is reduced to form shoulders adapted to aline With the shoulders of the T-shaped recess when the tooth 14 is in the deepest portion of an undulation of the disk 11. A spring 16 is provided on each side of the reduced portion of the burin holder within the shoulder part of the T-shaped slot 7 to engage a with the "slot" 17 of the burin holder, said slotted extension constituting a guide for the burin and serving as a thumb rest for the operator to guide the burin while it is actuated and also to control the pressure on the burin.

The burin 18 is coupled to the burin holder by a spring-actuated pin or plunger 20 which is located in the housing 6 and projects through an opening in the burin holder into a notch 21 in the burin. The spring-actuated plunger participates in the movement of the burin-holder when the same is actuated by the rotation of the disk 11. -A portion of the spring-actuated plunger projects out through the cover'section 9 into a suitable recess therein, whereby the plunger may be drawn from the notch 21 of the burin and the same may be removed from the housing. Another burin may be inserted by simply forcing it through the slotted extension until the plunger snaps into engagement with the notch of the burin. The springs, burin, and burin holder are retained in the housing by a bottom cover 22 secured to the housing in any suitable way. The bottom cover 22 is preferably covered with felt 23. or any other suitable material, so that the tool may rest on the work with out danger of injuring the same.

I claim:

1. In a power-actuated engraving tool, a housing having a shape to be easily accom= modated in the hollow of the hand, said housing having a T-shaped recess in the bottom thereof disposed in the longitudinal axis of the housing, said housing having a transverse slot therein disposed obliquely to the bottom and to the longitudinal axis of the housing, said T-shaped recess enter- [zontal planes, said housing having a slotted extension forming a guide for a burin,

means carried by the burin holder and operable through the housing for coupling or uncoupling the burin, and a bottom cover for said housing.

2. In a power-actuated engraving tool,

-a housing shaped to be easily accommodated in the hollow of the hand, said housing having a T-shaped recess in the bottom thereof disposed in the longitudinal axis of the housing, a burin holder mounted to slide in the T-shaped recess, said burin holder 7 having a reduced portion forming shoulders inthe shouldered part of the recess, springs in the recess for engaging the shoulders of the burin holder, said housing having a transverse slot disposed obliquely to the bottom and longitudinal axis of the housing, a disk in said slot having a smooth undulated surface, said burin holder having a tooth engaging the undulated surface of the disk, a shaft for rotating the disk extending out of the housing, said shaft being at an angle to the longitudinal axis of the vertical and horizontal planes, a slotted extension from the housing forming a guide for the burin and a thumb rest for guidingthe tool, a cover for the housing, and a spring-actuated plunger in the housing projecting through the burin holder and operable from the top of the housing for coupling the burin to the holder. a a

3. In a power-actuated engraving tool, a

housing shaped to be easily accommodated in the hollow of the hand, a burin holder mounted to slide in the housing, a springactuated plunger in the housing projecting into the burin holder for coupling a burin to the holder, said plunger having a portion thereof projecting through the top of the housing whereby it may be operated to uncouple the burin from .the holder, and revoluble means associated with the housing for reciprocating the burin holder.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, 11.0. i 

